# N550YS: 1997 Schoepflin Dale E DA-4-550, registration cancelled 2013-01-07

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: January 7, 2013
- Status when cancelled: Third renewal notice
- Airframe: [Schoepflin Dale E DA-4-550](https://openairdocs.org/model/schoepflin-dale-e-da-4-550) (registry code 05604Y5)
- Engine: [Continental IO-550 series](https://openairdocs.org/engine/continental-io-550-series) (registry code 17042)
- Data sheets: [TCDS E3SO](https://openairdocs.org/tcds/E3SO) (OpenAirDocs)
- Serial number: 97-001
- Year built: 1997
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: April 22, 1999
- Certificate issued: September 29, 2006
- Last registry action: October 20, 2009
- Mode S code: A701A2
- Owner when cancelled: [Humble William R](https://openairdocs.org/faa-owner/HUMBLE%20WILLIAM%20R)
- Location: [Moscow, ID](https://openairdocs.org/faa-place/ID/Moscow)
- Owner type: Individual
- Owner's area on the map: 46.7222° N, 116.9402° W: Placed by OpenAirDocs at the center of ZIP code 83843, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N550YS
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=550YS
- Page: https://openairdocs.org/deregistered/N550YS-2013-01-07

From the FAA registry file of October 29, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Schoepflin Dale E DA-4-550: https://openairdocs.org/model/schoepflin-dale-e-da-4-550.md

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR12LA410](https://openairdocs.org/ntsb/WPR12LA410), Sep 9, 2012: Schoepflin DA-4-550 (N550YS), Viola, ID, substantial damage, 1 fatal. Probable cause: The pilot's failure to maintain airplane control while maneuvering, resulting in an aerodynamic stall/spin with insufficient altitude to recover.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20120908018549A](https://openairdocs.org/incident/20120908018549A), Sep 8, 2012: Schoepflin Dale E DA-4-550 (N550YS), Viola, ID, Destroyed, 1 fatal. Pilot was dropping streamers while flying at aproximately 800 feet AGL over a large crowd of people gathered for a political fund raising dinner. Witnesses…

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.